PDF malware analysis — malicious · 866b52db534bc54c

MALICIOUS

PDF

46.0 KB Created: 2020-08-30 10:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a15106513fafdd45877d33c8b45acc7e SHA-1: 26be9ed67d16948beef71a94a5d6ca774f1d9fa3 SHA-256: 866b52db534bc54c0f014e2e740c2432891b24c75f1999d5eee7bdb3565a03c5

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=baixar+realtek+ati+hdmi+audio+device'. This URL is presented within the document body, suggesting a lure to download a file, likely malware. The PDF also exhibits characteristics of a link farm, with numerous embedded links to Shopify-hosted PDFs, indicating a potential SEO poisoning or spamming campaign. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://ttraff.ru/wix?keyword=baixar+realtek+ati+hdmi+audio+device
- https://cdn.shopify.com/s/files/1/0428/2023/9519/files/81747060485.pdf
- https://cdn.shopify.com/s/files/1/0431/0922/0501/files/cyfin_reporter_log_analyzer.pdf
- https://cdn.shopify.com/s/files/1/0430/4827/2023/files/74346351432.pdf
- https://cdn.shopify.com/s/files/1/0438/3024/7584/files/materiales_dentales_macchi.pdf
- https://static.usrfiles.com/ugd/b8c837_8fa69218529147fcae3f294073b34b4a.pdf
- https://static.usrfiles.com/ugd/9cc572_e3e42f034f31497b9314ad4e13c647a8.pdf
- https://cdn.shopify.com/s/files/1/0444/0332/7142/files/npm_not_recognized.pdf
- https://cdn.shopify.com/s/files/1/0432/0244/5475/files/80349271853.pdf
- https://cdn.shopify.com/s/files/1/0433/7631/2471/files/zugokevixarexorunamazi.pdf
- https://cdn.shopify.com/s/files/1/0430/7098/0247/files/jamixapusixufosu.pdf
- https://cdn.shopify.com/s/files/1/0437/6107/4337/files/85923868444.pdf
- https://cdn.shopify.com/s/files/1/0437/7939/1646/files/blood_group_o_negative_diet_chart_pdf.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000043ad.bin` `06f5694859efce91dd08b6f2754dbfd31c2f37b4c42fb42bc40fbd5a12baa6c3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x43AD	8544 bytes
`font_01_sfnt_off00006075.bin` `b455ea2e83c8c4841fec373e6da75fd0e07d9c219ebb08fdc12fe7a2decef14f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6075	5244 bytes
`font_02_sfnt_off00007227.bin` `1f5a084d20e0b1f4b6e68e78172de0396d1411b632582e5648038e7cf22db893`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7227	12528 bytes
`font_03_sfnt_off00009af7.bin` `b23d8e5e550a5ffa9351ee3c1314a22323d536c0d389ae212850c3d6a4be1306`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9AF7	4048 bytes

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